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TECHNICAL PAPERS

A Fundamental Model of Mistuning for a Single Family of Modes

[+] Author and Article Information
D. M. Feiner, J. H. Griffin

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

J. Turbomach 124(4), 597-605 (Nov 07, 2002) (9 pages) doi:10.1115/1.1508384 History: Received January 30, 2002; Online November 07, 2002
Copyright © 2002 by ASME
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References

Figures

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Near equivalence of sector mode and blade mode
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Finite element model of bladed disk system
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Tuned system frequencies
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Representative results of generally mistuned bladed disk—(a) mistuned frequency; (b) mode shape of 17th mode
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Blade amplitude as a function of excitation frequency for a 3rd engine order excitation
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Finite element model of bladed disk sector
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Tuned system frequencies of the first four families of modes
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Tuned system frequencies of the fundamental family of modes
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Representative results of realistic mistuned bladed disk—(a) mistuned frequency; (b) mode shape of 18th mode
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Blade amplitude as a function of excitation frequency for a 7th engine order excitation—(a) mass-spring response; (b) FMM response
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Leading-edge tip displacements for the third family of modes
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Blade amplitude as a function of excitation frequency for a 2nd engine order excitation—(a) family 2, (b) family 3, (c) family 4
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Blade amplitude as a function of excitation frequency for a 7th engine order excitation—(a) family 2, (b) family 3, (c) family 4

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